glutathione reactive oxygen species (ROS) are generated by the mitochondria as a Simultaneous analysis of reactive oxygen

CDC: Injection Safety (One and Only Campaign)

The same reaction can occur on protein cysteine, and the formed GSNO group functions as important intermediate in NO metabolism, a critical player in fulfilling the biolgogical function of NO in signal transduction ( S -glutathionylation (Zeng et al., 2001) or thanks to catalytic activity of GGT generate S-nitrosocysteinylglycine that in turn can be cleaved by a membrane dipeptidase thus forming S -nitrosocysteine (S-NO)

Each one can help whiten skin in its own way, by absorbing better, helping brighten skin, or just evening things out

Regular exposure to UV radiation activates an enzyme called tyrosinase, which stimulates melanocytes to produce melanin